Create new class instance from existing class based on array

Question

I have an array. I want to dynamically generate new class instances from an array.

class Test{
  constructor(name){
    this.name = name;
  }
  getName(){
    return this.name;
  }
}

let myArray = [ "instance1", "instance2", "instance3" ];

I want a result like this:

let myArray[i] = new Test;

myArray[i].getName();

Welcome! Your class in not well-defined ({} missing from constructor, for one). Look into Classes. Second value of myArry is not closed (with'). Did you want only element i of the array to be an instance of the class, or all the elements of the array? — iAmOren
– iAmOren, Commented Nov 6, 2020 at 15:09

Linda Paiste · Accepted Answer · 2020-11-08 01:19:52Z

1

Basically you just need to call Array.protype.map on the array, and as your callback function you use an arrow function to create a new Test from the array value.

class Test {
  constructor(name) {
    this.name = name;
  }
  getName() {
    return this.name;
  }
}

const names = ['instance1','instance2','instance3'];
const instances = names.map( name => new Test(name) );

console.log( instances[1].getName() ); // logs 'instance2'

answered Nov 8, 2020 at 1:19

Linda Paiste

42.6k8 gold badges81 silver badges118 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Create new class instance from existing class based on array

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related